Bobbin-stripping machine



y 2, 1931. w. w. UNDER 1,805,452

BOBBIN STRIPPING MACHINE Filed Aug. 15, 1929 pipes 61, 71, communicatingthrough the opposite heads of the cylinder with the interiorspaces ofthe cylinder at the opposite sides of the piston. Such provisionsinclude, further, a four-way valve, with the casing 81 of which the saidpipes connect. Also, a

supply-pipe 91 leading to the valve from a source of fluid underpressure. The means of controlling the application of fluid-pres sure tothe piston is exemplified by a valveplug 110 within said valve-casing81, such valve-plug having a convenient handle 11 by means of which itmay be turned, as required for causing the fluid-pressure to take effectagainst the proper side of the piston to actuate the plunger in thedesired direction. At 12 is a discharge-pipe connected with thevalve-casing, to lead away the exhaust from the cylinder. Thevalve-control herein is manual, at the will of an attendant upon themachine, but in the case of embodiment of the invention in a morecompletely automatic machine, the valve will be controlled and actuatedautomatically by the mechanism. i

With the bobbin properly applied to the machine and engaged with thestripper device, the fluidressure may, through actuation of the va ve,be made effective at one side of the piston to move the piston andbobbin-mover to cause the bobbin to travel lengthwise with relation tothe stripper so as to be stripped by the latter, after which by properadjustment of the valve the fluidpressure maybe made effective to returnthe piston and bobbin-mover to starting posiis will-be apparent, theemployment of fluid-pressure means for producing the relative movementbetween the bobbin and the stripper-device that is required foreffecting the strippin of the bobbin obviates the employment o cams,cranks, and other mechanism such as'heretofore has been employed for theproduction of such movement.

It is within the scope of the invention to utilize the fluid-pressureprinciple of actuation in connection with other modes of producingthemovement of a bobbin for the pur pose of efl'ecting the strippingthereof; and

with mechanism in which the relative movement is attained through travelof a stripperdevice while the bobbin remains in a definite position.

The stripper-device that is employed 1n a machine in whichfluid-pressure is utilized in accordance with my invention may be of anyapproved specific construction and specific mode of operation. Thatshown in the drawings and embodying a portion of the invention is of thetype comprising a pair of scraper or wiper-blades which are mounted inthe machine with capacity for movement toward and from each other, sothat they may be opened by being spread a art to receive between themthe barrelof a bobbin which is to be stripped, and may be closedtogether upon the said barrel to ensure scraping or wiping ofi theresidual wound material in a stripping operation. In this instance, theblades 21, 21, are attached to carriers 4, 4, and the re uiredmovability of the blades is provided or by such carriers being pivotedat 5, 5, to a bed 6. For the convenient actuation of the blades forclosing and opening, each carrier is connected by a link 7 to anoperatin lever 8 that is pivoted at 9 upon the bed. he said bed has ahole 10 therethrough, situated intermediately with respect to the blades21, 21,

and designed to accommodate the bobbin operated upon. Through such holethe leading portion of the bobbin is projected as the bobbin is thrustthrough between the blades 21, 21, by the workin stroke of plunger 31.

.One carrier and itsb ade are located at one lever, while the linkconnecting the other blade-carrier with the lever is engaged with thelever at the other side of the said fulcrum, movement of the lever willimpart movement vto both blade-carriers simultaneousl but in oppositedirections relative to eac other. Thus, through movements of the lever8, simultaneous movementof the blades toward each other for closing themupon the bobbin which is to be stripped is produced, and subsequentsimultaneous movement away from .each other for opening them apart. Inthe present instance, the lever 8 is hand-operated.

In a more completely automatic machine provision will be madeforoperating it automatically. In order to attain what may be termedparallelism of the acting edges of the blades 21, 21, and aparallel-motion movement of the blades as they open and close, I

have located the pivot 5 of one blade-carrier 4 at one end of suchblade-carrier and con nected the actuating link 7 to the free opp0-.site end of such blade-carrier, and have located the pivot of thesecond blade-carrier at the other end of the latter and connected theother link 7 to the free end of said second blade-carrier. Thereby, aswill be apparent) by the employmentofa cylinder, a piston from Fig. 2,as the blades are closed, together upon a bobbin the concfavities22whichjare formed in the acting edges of the blades are caused to fitagainst-ssymmetrically-dis osed opposing segments of the bobbin-peripery.

constructional details of mechanical embodiments utilizingfluid-pressure for the purposes herein set forth may vary in manyrespects.

In the case ofthe illustrated embodiment provision is made for arrest ofthe plunger and piston'at' the end of the stroke thereof in eachdirection by means of a hole through the piston from top to bottom,and'a valvemember '32 seating around said hole at the upper side of thepiston, with a valve-stem 33 extended down through the said hole andreceiving upon its extension below the piston and expanding spiralspring 34 confined between the under side of the piston and a foot y 35at the lower end of the valve-stem. The

said springacts with a tendency to press the valve against the saidseat, so as to keep the hole through the piston closed. As the pistoncompletes its clown-stroke occasioned by the fluid-pressureactingagainst the top surface of the piston, the foot of the valve-stemencounters the closed lower end of the cylinder, with the result thatthe valve is separated from its seat so as to permitfluid-pressuremedium to pass through the hole in the piston, from theupper side of the latter to the lower, side, thereby equalizing thepressure at both of the sides of the piston, so that the downstroke isarrested with a cushioned effect, and

I the piston and plunger remain at rest at the pressure against the fromwhich the relative movement required to produce the stripping action istransmitted, conduits for the pressure-medium in communicationwith thecylinder at opposite sides of-the piston, and a valve-device selectivelycontrolling the flow of said pressure medium through the said conduits.

3. Ina bobbin-stripper machine, a stripper-devicev comprising a pairofstrippermembers having bobbin-receiving concavlties intheir proximateedges, with saidmembers in parallelism longitudinally and respectivelypivoted at opposite ends, an actuating lever, and links connecting thefree ends of the respective stripper-members with the said lever atopposite sides ofthe lever-fulcrum, whereby through movement of thelever said members are brought closer together or separated withparallel motion.

4:. In a bobbin-stripping machine, the combination with abobbin-stripper device of a fluid-pressure-actuated plunger, and meansfor relieving the fluid-pressure at each end 7 of the movement of theplunger.

5. In a bobbin-stripping machine, the combination witha--bobbin-stripper device of a plunger operated by afluid-pressure-actuated piston, and meansfor relieving the fluidpistonat each end of the stroke of the latter. v I

' WILLIS W. LINDER;

extremity a nut 36. In the upstroke ofthe piston and plunger inreturning toward the normal or starting position thereof, this nutencounters the upper head of the cylinder, are resting the piston andplunger, whereupon the fluid-pressure at the under side of the piston,through acting against the foot 35 of the valve-stem, operates to raisethe valve and cushioning the arrest of the piston.

What is claimed as the invention is I 1. In a bobbin-stripper machine,the combination with a bobbin-stripper device, and a bobbin-engagingdevice, of fluid-pressure actuated means whereby relative movementbetween the bobbin and the Stripper-device;

is yieldingly' produced and the stripping thereby efi'ectuated. p 1 2.In abobbin-stripper machine, the combination according to claim 1,characterized

